assertNotNull(authData.getPac().getServerSignature());
            assertNotNull(authData.getPac().getKdcSignature());
        }
    }

    // Test exception for empty PAC
    @Test
    void testConstructorEmptyPac() {
        byte[] emptyToken = new byte[0];
        PACDecodingException e = assertThrows(PACDecodingException.class, () -> {
            new KerberosPacAuthData(emptyToken, keys);
        });